OnPolitics Today: 'Everything ... is at stake on Election Day'

Voters cast their ballots for Early Voting at the Los Angeles County Registrar's Office in Norwalk, California on November 5, 2018, a day ahead the November 6 midterm elections.(Photo: FREDERIC J. BROWN, AFP/Getty Images)

Today's subject line: President Donald Trump warned supporters at an Ohio rally about Tuesday's midterms: "Everything we have created and achieved is at stake on Election Day."

One more sleep until midterms. Here's what to know.

What's at stake Tuesday? The House and Senate, both currently controlled by Republicans, could tilt toward Democrats. All 435 seats in the House are up for grabs. A third of the Senate is up, too. Republicans will retain their majority in the Senate, polls suggest, but if Democrats take control of the House, they will have power to investigate Trump on issues from his unreleased tax returns to potential financial ties to Russia.